Nodes and hosts
Nodes are nanomachines utilized by the Helix Hegemony to make their agents effectively immortal. The Nodes take the genetic material, the combined technology and knowledge of their hosts and link these with a network of all of the other Node hosts in the vicinity, creating a community of skilled individuals and an ever-evolving race. When a host suffers a fatal wound, their body is broken down into its basic building blocks and over the course of 4 to 8 hours, the Nodes draw power from the domes to recreate the individual using aspects from the growing gene pool. The host is revived with a new body, appearance, a wide skill set, and some basic tools needed for survival pulled from the massive pool of supplies that the domes contain. The host’s personality and memories may be the same as their former incarnation, or they may take on new quirks and become a new individual. During regular function, the Nodes constantly evolve helpful mutations for their hosts taken from the large pool of individuals in a given dome.
Joining the Helix Hegemony and becoming a Node host is a voluntary transition, as the organization is a diplomatic one. In return for the ability to slow aging and be reborn effectively indefinitely, Node hosts agree to voluntary sterility (except in the case of small organisms who through the use of Nodes have become a single-minded hive organism, in which case the females reproduce through parthenogenesis and use a form of obligate diapause to delay the birth of their offspring, most often to replace killed or lost members of the hive organism) and a pact of nonaggression towards other members of the Helix Hegemony, both of which are enforced by the Nodes themselves.
The domes that power the Nodes are massive structures, built for a variety of purposes and intended to be entirely self-sufficient. The power required to continually maintain the Nodes of all of the members of the domes, especially the ones outside of regular contact with the domes, is massive. Many domes rely on several forms of power at once and remain stationary, but many if not all of them are capable of traveling long distances in short stints at a time. Depending on the environment and the amount of power to be harvested, domes often go years without having to travel. Food rations in the domes are homogenous, and come in the form of silica-gel like tablets that dissolve and expand in water to accommodate caloric intake, and regulate biological function via the Nodes when applicable. They do no harm to non-Node imbibers.